package com.tanhua.dubbo.server.api;

import com.alibaba.dubbo.config.annotation.Service;
import com.tanhua.dubbo.server.pojo.RecommendUser;
import com.tanhua.dubbo.server.vo.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

import java.util.List;


@Service(version = "1.0.0") // 声明这是一个dubbo服务
public class RecommendUserApiImpl  implements   RecommendUserApi{

    @Autowired
    private MongoTemplate mongoTemplate;

    @Override
    public RecommendUser queryWithMaxScore(Long userId) {
        //查询得分最大的用户,按照得分倒序排序
        Query query  = Query.query(Criteria.where("toUserId").is(userId))
                .with(Sort.by(Sort.Order.desc("score"))).limit(1);


        return this.mongoTemplate.findOne(query,RecommendUser.class);
    }

    @Override
    public PageInfo<RecommendUser> queryPageInfo(Long userId, Integer pageNum, Integer pageSize) {

        //构造分页并且排序参数
        PageRequest pageRequest = PageRequest.of(pageNum -1,pageSize,Sort.by(Sort.Order.desc("score")));
        Query query  =Query.query(Criteria.where("toUserId").is(userId))
                .with(pageRequest);
        List<RecommendUser> recommendUserList = this.mongoTemplate.find(query, RecommendUser.class);

        //暂时不提供数据总数
        return new PageInfo<>(0,pageNum,pageSize,recommendUserList);
    }
}
